JMenu ActionListener

• 对于

  JMenu

  使用

  MenuListener

码

import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;public class ActionExample {    public ActionExample() {        JMenu menu = new JMenu("Menu");        menu.setMnemonic(KeyEvent.VK_M);        menu.addMenuListener(new SampleMenuListener());        JMenu menu1 = new JMenu("Tool");        menu1.setMnemonic(KeyEvent.VK_T);        menu1.addMenuListener(new SampleMenuListener());        Jframe f = new Jframe("ActionExample");        JMenuBar mb = new JMenuBar();        mb.add(menu);        mb.add(menu1);        f.setJMenuBar(mb);        f.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        f.pack();        f.setLocationRelativeTo(null);        f.setVisible(true);    }    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() { @Override public void run() {     ActionExample actionExample = new ActionExample(); }        });    }}class SampleMenuListener implements MenuListener {    @Override    public void menuSelected(MenuEvent e) {        System.out.println("menuSelected");    }    @Override    public void menuDeselected(MenuEvent e) {        System.out.println("menuDeselected");    }    @Override    public void menuCanceled(MenuEvent e) {        System.out.println("menuCanceled");    }}

• JMenuItem

  仅用于ButtonModel